Need 3spd shifter linkage

[l1n1b1]

I'm new here. Located in south Louisiana, I am currently working on a '67 SWB stepside for my 15 yr. old son. We are having trouble trying to locate shifter linkage for the 3 speed on the column. The prior owner had lost the linkage and installed a cheeseball after market floor shifter. I am trying to get the truck back to original status. Any information on parts availability would be greatly appreciated.